Balanced window sash



Sept. 27, 1932. l R, B, BROWNE BALANCED WINDOW SASH Sept. 27, 1932. R. B. BRowNE BALANCE!) WINDOW sA'sH Fil`ed Jan.

27, 1932 3 Sheets-Sheet 3 i l l wwf/vra@ A Yis Patented Sept. 27, 1932 UNITED STATES RICHARD B. BROWNILYOF BROOKLYN, NEW YORK IBALANCED WINDOW SASH Application led January 27, 1932. Serial No. 589,101.17"

The object of my invention is to provide sashes which are self contained and will automatically hold themselves at any desired level and which may be raised or lowered by grasping any portion of the sash. This and other objects are accomplished by my invention, one embodiment of which is hereinafter more particularly set forth.

For a more particular description of my invention, reference is to be had to the accompanying drawings forming a part hereof in which Figure 1 is asectional view of a sash and a portion of a window frame embodying my invention. The section is taken'on the line 1-1 of Figure 3, .looking in the direction of the arrows; Y

Figure 2 is a sectional view on the line 2 2 of Figure 1, looking in the direction of the arrows; Y

Figure 3 is a longitudinal section of a window provided with my improved sash;

Figure 4 is an enlarged sectional view taken on the line 4 4 of Figure 3, looking in the direction of the arrows; s

Figure .5 is a diagrammatic view showing rails and rollers for a lower sash; and

Figure 6 is a., corresponding view for an upper sash, the rollers in each case in dotted circles indicating the opposite from the closed position; and

Figure 7 shows a window with two sashes embodying my invention, the interior mecha nisms being omitted, except that rollers are shown in dotted lines.

Throughout the various views kof the drawings, similar reference characters designate similar parts. Y v

2 In the preferred embodiment of my invention, my improved window 1 has a frame 2, an upper sash 3, and a lower sash 4. The sashes are provided at suitable positions with angle metal strips 5, which hold packing 6 in the conventional manner, or in any desired manner, so as to make a wherever desirable.

The frame 2 is conventional in all respects except that in each style are rails 7 and 8, the former for the lower and the latter for the upper sash. The form of these rails can best be gathered from Figures 5 and 6. The rail 7 has a lower roller 9 and an-upper roller 10 and correspondingly, the rail 8 has a lower roller 11 and an upper roller 1 2. Each rail is divided into two parts so that each roller runs on one part only and these parts are connected by a horizontal line. These rollers, as will appear below, are pivotally mounted and spring pressed in their respective sashes, so thatV they press against their respective tracks. And it will be noted that at the top and bottom, these rollers rest in slight depressions, and that between these depressions, these tracks are not straight'but are inwardly curved, something like one-sixteenth of an inch in two feet, so as to compensate to some extent for the compressions of the springs, as the rollers run on their tracks. This curvature is particularly noted, because, although 'n it is slight and hard to show in a drawing, it is particularly important in the functioning of the apparatus for reasons which will appear below.

In the embodiment of my invention which 55 is shown herein, the sashes 3 and 4 have hollow frames which are preferably made of sheet metal 18, but may be made in any suitable way. Glass 14 is held in these frames in the conventional manner, so that no further description of this detail is necessary. In the vertical tubing of each frame and near the corner thereof, as indicated in Figure 1, is placed a pivot 15 which is supported by the frame or a reenforcement thereof. On this 85 pivot is a link 16 which runs to a pivot 17 of a roller 9 or 10, asrthe case may be. These pivots also turn in suitable springcaps'18,each of which has a vpost surrounded by a coil spring 19 that runs to a rod 2O with a'collar '90 weather tight joint` l 21 thereon against which the spring rests. These rods have at their inner ends right and left nuts 22 to receive and t corresponding threads on a right and left screw 23 so that by turning this screw the tension on the, springs 19 may be varied. Each nut 22 has a lug 24 extending laterally therefrom so as to prevent it from turning in the case 18. A. suitable opening 25 (see Figure 4) is made in the casing 13 to give access to the holes in the right and left screw 23 for the purposes of this adjustment.

The spring caps 18 are also provided with laterally extending ears 26 to which are pivotally connected the equalization links 27 which, at their inner ends, are pivotally'connected to an equalizing lever 28 pivotally tions.

mounted on a bracket 29 fixed to the interior of the casing 13. This `construction equalizes the tension of the springs 19 so that an equal tensionis on the-wheels 1() or the wheels 9.

It is desirable that the wheels 9, 10, 11 and 12 be mounted on spindles 17 through the agency of ball bearings so as to reduce friction to -a minimum.

The mounting of the rollers 11 and 12 in the upper vsash 3 is precisely the same as the mounting ofthe rollers 9 and 10 in the lower sash, andthe spring systems and equalizing systems Varethe same in each. It is apparent from the foregoing that the inclination of the rails 7 and 8 causes the springs 19to have decreased tension as the sashes are raised and increased tension as the A. sashes are lowered. By actual experience, it

was found 'that when the rails 7 and 8 were straight, the rollers riding thereon, spring pressed as above stated, functioned irregularly and badlyvand it was impossible to hold asash in any position if the sashwere mounted on rollers with a minimum friction so that they could move easily. This difticulity was overcome by curving the rails 7 and 8 slightly inwardly as abovespecied, and the equalizing mechanism also favored a proper functioning of the rollers, the two means together 'giving a perfect result. At the extreme ends of their runs, the rollers on the rails 7 and 8 are placed in slight depressions so that a slightly increased pressure is required to shift the' sashes when at their extreme positions. This is desirable but not essential. It has been found by experience that the sashes made asabove described shift so freely and easily that it is desirable to hold them as above indicated at their extreme upper and lower posi- In vview of the foregoing, the operation of my invention will be readily understood. To shift a window, it is necessary to exert a very slight pressure at any part of the window in the direction in which it is ldesired to move it, and after the-start, even this'slight pressure .is reduced. and the windows may be easily stopped regardless of their weight at any desired elevation, and will hold the positions into which they are set.

lVhile I have shown and described one embodiment of my invention, it is obvious that itis not restricted thereto, but that it is broad enough to cover all structures that come within the scope of the annexed claims.

Having thus described my invention, what I claim is:

1. In a window of the class described, a sash, curved tracks within the window frame adjacent to said sash, spring pressed rollers running on said tracks, links each pivotally connected at one end to the sash and at the otherto a roller and extending in the direction of movement of said sash and means for equalizing the pressure of said rollers on said tracks whereby the weight of the sash is Vcounterbalanced evenly at different levels.

2. In a window of the class described, a sash, curved tracks contained within the window frame alongside said sash, spring pressed rollers running on said tracks, links connecting said rollers and sash, and means for ad- ]usting the tension of the springs pressing the rollers.

3. In a window of the class described, a sash, curved tracks with tapered ends contained within the window frame alongside said sash, spring pressed rollers running on said tracks, and links connecting the rollers and sash, whereby the sash may be held at certain levels. with no more than normal stress. 1 4. In a window of tlieclass described, a sash, curved tracks contained within the window frame alongside said sash, and' spring pressed rollers at the topand bottom of said sash, these rollers being connected to the sash by means of links.

5. In a window of the class described, a sash, tracks within the window frame which tracks slightly diverge from each other, spring pressed rollers running on said tracks, each roller having a' suitable support and being connected to the sash by a link pivoted thereto at one end and to the roller ysupport at the other, and means for equalizing the pressure of the rollers on said tracks.

6. In awindow of the class described, a sash, divergent tracks within the window frame, and a pair of spring-pressed rollers vrunning on said/tracks and havingeach a suitable support, one roller `being connected to one side of said sash by a link pivoted thereto at one end and to the roller support atv the other, and the other roller being simi* larly connected to the other side of said sash. y 7. In a window of the class described, a sash, tracks withinthe window frame, a pair of spring-pressed rollers running on ksaid tracks Yand having each a suitable support, linkseach pivoted at one end to said sash and to a roller support at the other, 4and means for equalizing the pressure of said rollers on said tracks, said means comprising a pair of links each connected at one end to a roller and at the other to its companion link through an equalizing member.

s 8. In a window of the class described, a sash, tracks within the window frame adjacent to said sash, a pair of rollers at the top f said sash and a second pair at the bottom thereof, each roller having a suitable sup- 1o port and bein connected to said sash by a link pivoted tereto, at one end and to the roller support at the other. Y

In testimony whereof, I have hereunto set my hand this 26 day of January, 1932. RICHARD B. BROWNE. 

